Will resizing reduce the quality?

Making an image smaller keeps it sharp. Enlarging beyond the original size can look soft, because the browser has to invent extra pixels.

Does it keep transparency?

Yes, if you export as PNG or WebP. Exporting as JPG removes transparency and fills it with white, since JPG has no alpha channel.

Is my image uploaded anywhere?

No. The image is resized locally in your browser and never leaves your device.

Which input formats work?

PNG, JPG and WebP have the most reliable browser support. GIF and SVG may load when your browser can decode them, but animated files export as a single frame. HEIC support varies by browser.

Image Tools

Image Resizer

Resize an image to exact pixels or a percentage, keeping the aspect ratio, then download it.

Free browser toolRuns in your browserNo sign-up

Precision resize

Resize with exact control

Set exact pixel dimensions, preserve the original aspect ratio and verify the result before export.

Browser basedFiles stay private

1Choose an image
2Set dimensions
3Preview and export

Drop an image here, or click to choose

PNG, JPG, WebP, GIF and more. Nothing is uploaded.

Best support: PNG, JPG and WebP. Browser-readable GIF and SVG files can be processed, but animated images export as a single frame. HEIC support depends on your browser.

Export: PNG, JPG or WebP at the dimensions you choose.No upload, account or watermark added by ToolsOnDuty.

About the Image Resizer

This image resizer lets you change the dimensions of any picture without installing software. Set an exact width and height, or scale by a percentage, and download the result.

Lock the aspect ratio to avoid stretching, or unlock it to fit an exact size. You can also choose the output format, so the same tool doubles as a quick converter.

Everything happens in your browser using the Canvas API, so your image is never uploaded to a server.

Key features

Resize by exact pixels or by percentage
Ready-made social, profile, HD and email sizes
Lock or unlock the aspect ratio
Download as PNG, JPG or WebP
Live preview before you download
Private, in-browser processing

How to use

1Drop or choose an image.
2Enter a new width or height, or use the percentage buttons.
3Keep the aspect ratio locked unless an exact non-proportional size is required, then confirm the preview is not stretched.
4Pick an output format and download the resized image.

Examples

Resize proportionally

Input: 1200 x 800 image; width 600 with aspect ratio locked

Output: 600 x 400 image

Locking the aspect ratio adjusts the height automatically and avoids stretching.

Frequently asked questions

Will resizing reduce the quality?: Making an image smaller keeps it sharp. Enlarging beyond the original size can look soft, because the browser has to invent extra pixels.
Does it keep transparency?: Yes, if you export as PNG or WebP. Exporting as JPG removes transparency and fills it with white, since JPG has no alpha channel.
Is my image uploaded anywhere?: No. The image is resized locally in your browser and never leaves your device.
Which input formats work?: PNG, JPG and WebP have the most reliable browser support. GIF and SVG may load when your browser can decode them, but animated files export as a single frame. HEIC support varies by browser.

Image GuidesResize, Compress, or Convert an Image: Which One Do You Need?Read guide

Open a related tool to prepare your files or refine the finished result.